SOLUTION: in a 20 gallon mixture of milk and water there is 5% water . how much water must be added to make it 10% of the final mixture?

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Question 885723: in a 20 gallon mixture of milk and water there is 5% water . how much water must be added to make it 10% of the final mixture?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
volume per volume, focused on concentration of water.

Let v = amount of pure water to add.
highlight_green%28%2820%2A5%2Bv%2A100%29%2F%28v%2B20%29=10%29.
Solve for v.

The equation can be simplified before solving. Again, reminder: the focus is on the concentration of water. Not on the milk, and not on the water which came with the source milk.